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Proven 351w Combo

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    #1

    Proven 351w Combo

    I'm clearing out some stuff on the computer and figured some of this might be of interest. I might post up some other stuff but here i just one combo. Keep in mind this was 3 years ago. The dyno sheet is off an engine dyno, and would easily throw down 400rwhp through an aod in a panther.

    Anyways, to the specs:

    351W - true roller cam block
    .03 over bore and 0 decked
    AFR 185's with 10:1 c/r
    CompCams XFI 236HR-14 cam ( .579/.579 236/248 114lobe )
    long tube headers
    FMS windage tray
    VicJr. intake
    750 carb
    33* total timing



    That particular run it made 468hp and 433 ft lbs. (remember this is crank hp on an engine dyno)

    And this was with a few shortcuts being taken in the build, and some less than optimum components being used. Eventually, the owner did run a bigger intake on it and picked up some power there. With a piston swap to get somewhere around 10.4-10.6:1 compression and a cam to match - no doubt it could have probably gotten to about 500hp with those heads. And i personally, HATE AFR heads, but if you set them up properly (new springs, locks, retainers) they can perform ok, granted, you could have just bought something better already setup for less money, but i digress.

    Just thought i'd post this since it's a known proven combo, and could be slapped together by anyone looking for an upgraded 351 in their panther. I might have some other combos to add, later, if someones interested.
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    #2
    How "streetable" is a setup like this?

    Comment

      #3
      Originally posted by CaptainKRM View Post
      How "streetable" is a setup like this?

      What do you mean by streetable? It could drive anywhere on cheap 87 octane if that's what your asking.

      Comment

        #4
        Streetable for me means a smooth idle, decent off-idle power, such like that, and not having to be wound up to 3500+ to move out of it's own way after it shook your teeth out at a stoplight.

        Just out of curiosity, is it typical for an engine dyno to only start logging over 4,000 rpm? I've always been more interested in the really low rpm stuff, like 2000 on up. Its not a subject I've ever looked into, never had a motor worth putting on a dyno.
        86 Lincoln Town Car (Galactica).
        5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

        91 Lincoln Mark VII LSC grandpa spec white and cranberry

        1984 Lincoln Continental TurboDiesel - rolls coal

        Originally posted by phayzer5
        I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

        Everything looks like voodoo if you don't understand how it works

        Comment

          #5
          Originally posted by gadget73 View Post
          Streetable for me means a smooth idle, decent off-idle power, such like that, and not having to be wound up to 3500+ to move out of it's own way after it shook your teeth out at a stoplight.

          Just out of curiosity, is it typical for an engine dyno to only start logging over 4,000 rpm? I've always been more interested in the really low rpm stuff, like 2000 on up. Its not a subject I've ever looked into, never had a motor worth putting on a dyno.

          Since they split this one up to 300rpm steps, it ends up printed out on multiple pages. I'll see if i can find the printout from the lower rpm range. It was above 300 ft lbs of tq at 3000rpm, though.

          Comment

            #6
            Yes, I'd be interested to see the lower-RPM output as well, since that's really where you need it in a heavy car, unless you want to run a torque converter with a ridiculously high stall.

            2001 Ford Crown Victoria P71 - "The Fire Engine"
            1985 Lincoln Town Car Signature Series
            But God demonstrates his own love for us in this: While we were still sinners, Christ died for us. Romans 5:8

            Comment

              #7
              It would be pretty hard to kill low end torque with 351 cubic inches and such a small cylinder head, unless the tune is out to lunch.

              Comment

                #8
                Good points. What's the duration on the cam? With the specs that you gave in the original post, I would guess it was fairly long; that and the single plane intake (Vic Jr. is single plane, yes?) were what got me wondering about the low-RPM capabilities of this combo.

                2001 Ford Crown Victoria P71 - "The Fire Engine"
                1985 Lincoln Town Car Signature Series
                But God demonstrates his own love for us in this: While we were still sinners, Christ died for us. Romans 5:8

                Comment

                  #9
                  Here's the detailed Cam card spec sheet on it:

                  http://www.compcams.com/Cam_Specs/CamDetails.aspx?csid=1068&sb=2
                  Edelbrock is the most respected name in performance! Since 1938, Edelbrock has manufactured its core products in the USA for quality and performance.


                  RPM Range: 2600 to 6300
                  They advertise it more or less as a good street 347 stroker cam, but a .030 over 351 for all intents and purposes isn't much different. If anything, the added Cubic inch will make it idle smoother than it would in a 347.

                  I know some people will argue against AFR 185's being a small cylinder head, but lets remember that GM uses 260cc heads on their small blocks that go into heavy trucks and idle smooth.

                  Comment

                    #10
                    That reminds me, you also stated in your original post that you dislike AFR heads. What head(s) do you prefer?

                    2001 Ford Crown Victoria P71 - "The Fire Engine"
                    1985 Lincoln Town Car Signature Series
                    But God demonstrates his own love for us in this: While we were still sinners, Christ died for us. Romans 5:8

                    Comment

                      #11
                      To be honest, it's not that the AFR heads can't make power on something like a stock stroke pumpgas 302 or 351 (i wouldn't think about using them on 400+cubic inch), it's just that you need to sink money into them to really make them ideal. The springs, locks, retainers are the issue areas. Even power-wise, they do give up a bit having a stock 20* valve angle vs. Trickflows Twisted Wedge 15* angle which puts the valve in a more ideal location for complete combustion. I even have some 'up the bore' pics comparing the valve location in relation to the bore.

                      But if you were doing a pumpgas 351 deal for example? Trickflow 190 fac, 185Tw(twisted wedge) or 205CNC twisted wedge are good deals that'll run you a hair under $1500 (more or less the same price as AFRs). Brodix heads are among my favorites as well, and have some great options packages. That's just my honest opinion, though.

                      Comment

                        #12
                        This is a mustang build.

                        Comment

                          #13
                          Originally posted by Pirate View Post
                          This is a mustang build.
                          I hate to say your wrong but, your wrong.

                          Comment

                            #14
                            Originally posted by Outlaw440 View Post
                            I hate to say your wrong but, your wrong.
                            Recommended convertor for this build? Projected vacuum at idle?

                            Comment

                              #15
                              I am going to have to get back to you on that since i honestly do not remember off the top of my head.

                              But, i was able to find the video of the dyno run. There's alot of background noise, but, it idles fairly decent with a slight lope. When it was finally popped into the car i believe idle was set for 850rpm.

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